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https://www.readbyqxmd.com/read/28738596/chromatographic-separation-of-racemic-praziquantel-and-its-residual-determination-in-perch-by-lc-ms-ms
#1
Limin He, Fuming Gao, Erfen Li, Jauh Tzuoh Lee, Liangqiao Bian, Daniel W Armstrong
An enantioselective depletion study of praziquantel (PZQ) in perch muscle was done using a simple, sensitive and specific liquid chromatography-tandem mass spectrometry (LC-MS/MS) method. Two cyclic polypeptides and two cyclic saccharide chromatographic columns were evaluated. The new hydroxypropyl β-cyclodextrin (HP-RSP) superficially porous particle (SPP) column produced the optimum separation and was selected for the study. Deuterium labeled PZQ-d11 was used as the internal standard. The method was linear over concentration ranges of 5...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28722486/neurotoxic-effects-of-subchronic-intratracheal-mn-nanoparticle-exposure-alone-and-in-combination-with-other-welding-fume-metals-in-rats
#2
Zsuzsanna Máté, Edina Horváth, András Papp, Krisztina Kovács, Etelka Tombácz, Dániel Nesztor, Tamás Szabó, Andrea Szabó, Edit Paulik
Manganese (Mn) is a toxic heavy metal exposing workers in various occupational settings and causing, among others, nervous system damage. Metal fumes of welding, a typical source of Mn exposure, contain a complex mixture of metal oxides partly in nanoparticle form. As toxic effects of complex substances cannot be sufficiently understood by examining its components separately, general toxicity and functional neurotoxicity of a main pathogenic welding fume metal, Mn, was examined alone and combined with iron (Fe) and chromium (Cr), also frequently found in fumes...
July 19, 2017: Inhalation Toxicology
https://www.readbyqxmd.com/read/28710404/assuring-quality-in-microplastic-monitoring-about-the-value-of-clean-air-devices-as-essentials-for-verified-data
#3
Charlotte Wesch, Anna Maria Elert, Manuel Wörner, Ulrike Braun, Roland Klein, Martin Paulus
Avoiding aerial microfibre contamination of environmental samples is essential for reliable analyses when it comes to the detection of ubiquitous microplastics. Almost all laboratories have contamination problems which are largely unavoidable without investments in clean-air devices. Therefore, our study supplies an approach to assess background microfibre contamination of samples in the laboratory under particle-free air conditions. We tested aerial contamination of samples indoor, in a mobile laboratory, within a laboratory fume hood and on a clean bench with particles filtration during the examining process of a fish...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28698634/transportation-safety-of-lithium-iron-phosphate-batteries-a-feasibility-study-of-storing-at-very-low-states-of-charge
#4
Anup Barai, Kotub Uddin, Julie Chevalier, Gael H Chouchelamane, Andrew McGordon, John Low, Paul Jennings
In freight classification, lithium-ion batteries are classed as dangerous goods and are therefore subject to stringent regulations and guidelines for certification for safe transport. One such guideline is the requirement for batteries to be at a state of charge of 30%. Under such conditions, a significant amount of the battery's energy is stored; in the event of mismanagement, or indeed an airside incident, this energy can lead to ignition and a fire. In this work, we investigate the effect on the battery of removing 99...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28696897/polymorphisms-of-xenobiotic-metabolizing-enzymes-in-bladder-cancer-patients-of-the-semmelweis-university-budapest-hungary
#5
Dörte Ebbinghaus, Gergely Bánfi, Silvia Selinski, Meinolf Blaszkewicz, Hannah Bürger, Jan G Hengstler, Péter Nyirády, Klaus Golka
Polymorphic xenobiotic metabolizing enzymes such as N-acetyltransferase 2 (NAT2) or glutathione S-transferase M1 (GSTM1) are known to modulate bladder cancer risk. As no apparent data were available from Hungary, a former member of the eastern European economic organization, a study was performed in Budapest. In total, 182 bladder cancer cases and 78 cancer-free controls were investigated by questionnaire. Genotypes of NAT2, GSTM1, GSTT1, rs1058396 and rs17674580 were determined by standard methods. Current smokers' crude odds ratio (OR) (3...
July 11, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28695930/a-dual-ion-electrochemistry-deionization-system-based-on-agcl-na0-44mno2-electrodes
#6
Fuming Chen, Yinxi Huang, Lu Guo, Meng Ding, Hui Ying Yang
Novel desalination technologies with high ion removal capacity and low energy consumption are desirable to tackle the water shortage challenge. Herein, we report a dual-ion electrochemistry deionization (DEDI) system with silver chloride as the electrochemical chloride release/capture anode, sodium manganese oxide as the electrochemical sodium release/capture cathode, and flow salt solution as the electrolyte. Sodium and chloride ions are synergistically released to the flow electrolyte feed at an applied positive current...
July 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28692252/a-piezochromic-dysprosium-iii-single-molecule-magnet-based-on-an-aggregation-induced-emission-active-tetraphenylethene-derivative-ligand
#7
Wen-Bin Chen, Yan-Cong Chen, Jun-Liang Liu, Jian-Hua Jia, Long-Fei Wang, Quan-Wen Li, Ming-Liang Tong
A bifunctional dysprosium(III) dimer, [Dy2(HTPEIP(OMe))2(OAc)4(NO3)2] (1), comprising an AIE-active (AIE = aggregation-induced emission) ligand of 2-methoxy-6-[[[4-(1,2,2-triphenylvinyl)phenyl]imino]methyl]phenol (HTPEIP(OMe)), was successfully synthesized. It not only behaves as a single-molecule magnet (SMM) with an energy barrier of 168(15) K at zero field but also exhibits piezochromism during the pressing-fuming cycle with switchable color, photoluminescence, and magnetic response.
July 10, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28687678/occupational-exposure-to-pesticides-are-associated-with-fixed-airflow-obstruction-in-middle-age
#8
Sheikh M Alif, Shyamali C Dharmage, Geza Benke, Martine Dennekamp, John A Burgess, Jennifer L Perret, Caroline J Lodge, Stephen Morrison, David Peter Johns, Graham G Giles, Lyle C Gurrin, Paul S Thomas, John Llewelyn Hopper, Richard Wood-Baker, Bruce R Thompson, Iain H Feather, Roel Vermeulen, Hans Kromhout, E Haydn Walters, Michael J Abramson, Melanie Claire Matheson
RATIONALE: Population-based studies have found evidence of a relationship between occupational exposures and Chronic Obstructive Pulmonary Disease (COPD), but these studies are limited by the use of prebronchodilator spirometry. Establishing this link using postbronchodilator is critical, because occupational exposures are a modifiable risk factor for COPD. OBJECTIVES: To investigate the associations between occupational exposures and fixed airflow obstruction using postbronchodilator spirometry...
July 7, 2017: Thorax
https://www.readbyqxmd.com/read/28685780/cyanotetrazolylborohydride-ctb-anion-based-ionic-liquids-with-low-viscosity-and-high-energy-capacity-as-ultrafast-igniting-hypergolic-fuels
#9
Xingye Li, Hongyu Huo, Haibo Li, Fude Nie, Hongquan Yin, Fu-Xue Chen
A series of hypergolic cyanotetrazolylborohydride (CTB) anion-based ionic liquids have been synthesized by a straightforward N-hydroboration of tetrazole followed by a salt metathesis reaction, which exhibited remarkably low viscosity (<20 mPa s), high density (often >1.1 g cm(-3)), and ultra-short ignition delay time (as short as 1.4 ms) upon contact with white fuming nitric acid (WFNA).
July 7, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28681805/biomedical-waste-management-guidelines-2016-what-s-done-and-what-needs-to-be-done
#10
Lipika Singhal, Arpandeep Kaur Tuli, Vikas Gautam
The latest biomedical waste (BMW) management guidelines which have been introduced in 2016 are simplified and made easier so that they can be easily followed by various health agencies. The categories of BMW have been reduced from ten (in 1998) to four in the latest (2016) guidelines. Many changes have been made in these latest guidelines, which have been summarised in the article below. The segregation of hospital waste plays a very important role, so the waste has to be sorted out at the source of generation according to the category to which it belongs as given in the newer guidelines...
April 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28661706/designing-a-health-game-intervention-supporting-health-literacy-and-a-tobacco-free-life-in-early-adolescence
#11
Heidi Parisod, Anni Pakarinen, Anna Axelin, Riitta Danielsson-Ojala, Jouni Smed, Sanna Salanterä
OBJECTIVE: The purpose of this study was to explore the design of a health game that aims to both support tobacco-related health literacy and a tobacco-free life in early adolescence and to meet adolescents' expectations. MATERIALS AND METHODS: Data were collected from adolescents using an open-ended questionnaire (n = 83) and focus groups (n = 39) to obtain their view of a health game used for tobacco-related health education. The data were analyzed using thematic analysis...
June 29, 2017: Games for Health
https://www.readbyqxmd.com/read/28660804/evaluation-of-the-molecular-mechanisms-associated-with-cytotoxicity-and-inflammation-after-pulmonary-exposure-to-different-metal-rich-welding-particles
#12
Mohammad Shoeb, Vamsi Kodali, Breanne Farris, Lindsey M Bishop, Terence Meighan, Rebecca Salmen, Tracy Eye, Jenny R Roberts, Patti Zeidler-Erdely, Aaron Erdely, James M Antonini
Welding generates a complex aerosol of incidental nanoparticles and cytotoxic metals, such as chromium (Cr), manganese (Mn), nickel (Ni), and iron (Fe). The goal was to use both in vivo and in vitro methodologies to determine the mechanisms by which different welding fumes may damage the lungs. Sprague-Dawley rats were treated by intratracheal instillation (ITI) with 2.0 mg of gas metal arc-mild steel (GMA-MS) or manual metal arc-stainless steel (MMA-SS) fumes or saline (vehicle control). At 1, 3, and 10 days, bronchoalveolar lavage (BAL) was performed to measure lung toxicity...
June 29, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28654804/fatal-and-non-fatal-burn-injuries-with-electrical-weapons-and-explosive-fumes
#13
Mark W Kroll, Mollie B Ritter, Howard E Williams
INTRODUCTION: While generally reducing morbidity and mortality, electrical weapons have risks associated with their usage, including eye injuries and falls. With the presence of explosive fumes or fuels there also exists the possibility of burn injury. METHODS: We searched for cases of fatal and non-fatal major burns with TASER(®) electrical weapon usage where there was a possibility that the weapon ignited the explosion. RESULTS: We confirmed 6 cases of fatal burn injury and 4 cases of major non-fatal burns out of 3...
August 2017: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/28652261/bma-annual-meeting-government-is-trying-to-keep-nhs-running-on-fumes-departing-bma-chair-warns
#14
(no author information available yet)
No abstract text is available yet for this article.
June 26, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28648610/glycan-activation-of-a-sheddase-electrostatic-recognition-between-heparin-and-prommp-7
#15
Yan G Fulcher, Stephen H Prior, Sayaka Masuko, Lingyun Li, Dennis Pu, Fuming Zhang, Robert J Linhardt, Steven R Van Doren
Heparan sulfate proteoglycans activate the matrix metalloproteinase-7 zymogen (proMMP-7) and recruit it in order to shed proteins from cell surfaces. This occurs in uterine and mammary epithelia, bacterial killing, lung healing, and tumor cell signaling. Basic tracks on proMMP-7 recognize polyanionic heparin, according to nuclear magnetic resonance and mutations disruptive of maturation. Contacts and proximity measurements guided docking of a heparin octasaccharide to proMMP-7. The reducing end fits into a basic pocket in the pro-domain while the chain continues toward the catalytic domain...
July 5, 2017: Structure
https://www.readbyqxmd.com/read/28633889/serious-pneumococcal-disease-outbreak-in-men-exposed-to-metal-fume-detection-response-and-future-prevention-through-pneumococcal-vaccination
#16
Judith Ewing, Lynsey Patterson, Neil Irvine, Lorraine Doherty, Anne Loughrey, Joe Kidney, Carmen Sheppard, Georgia Kapatai, Norman K Fry, Mary Ramsay, Lucy Jessop
Welders and those exposed to metal fume are known to be at increased risk of pneumococcal pneumonia and invasive pneumococcal disease. Current UK guidance recommends that vaccination against pneumococcus be considered in those at risk of frequent or continuous occupational exposure to metal fume, taking into account the exposure control measures in place. We report an outbreak of serious pneumococcal disease that occurred between April and June 2015 among a multinational workforce exposed to metal fumes while working on the refurbishment of an oil rig in a Belfast shipyard...
July 13, 2017: Vaccine
https://www.readbyqxmd.com/read/28625577/risk-factors-for-chronic-cough-among-14-669-individuals-from-the-general-population
#17
Yunus Çolak, Børge G Nordestgaard, Lars C Laursen, Shoaib Afzal, Peter Lange, Morten Dahl
BACKGROUND: Risk factors for chronic cough in the general population have not been described systematically. We identified and ranked chronic cough risk factors at the individual and community level using data from 14,669 individuals from the Copenhagen General Population Study. METHODS: Severity of chronic cough was assessed using the Leicester Cough Questionnaire (LCQ). We ranked chronic cough risk factors based on magnitude of age-adjusted ORs at the individual level and of the population attributable risks (PARs) at the community level...
June 15, 2017: Chest
https://www.readbyqxmd.com/read/28624528/derivation-of-an-occupational-exposure-level-for-manganese-in-welding-fumes
#18
Lisa A Bailey, Laura E Kerper, Julie E Goodman
Exposure to high levels of manganese (Mn) in occupational settings is known to lead to adverse neurological effects. Since Mn is an essential nutrient, there are mechanisms that maintain its homeostatic control in the body, and there is some level of Mn in air that does not perturb Mn homeostasis. However, the Mn exposure concentrations at which no adverse effects are expected in occupational settings vary considerably across regulatory agencies. We set out to derive a Mn Occupational Exposure Level (OEL) for welders based on a review of studies that evaluated Mn exposure concentrations from welding fumes and: (1) neurological effects in welders; (2) levels of Mn in the brains of welders (via pallidal index [PI] estimated from magnetic resonance imaging [MRI]); (3) other biomarkers of Mn exposure in welders (i...
June 15, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28619938/kilogram-scale-prexasertib-monolactate-monohydrate-synthesis-under-continuous-flow-cgmp-conditions
#19
Kevin P Cole, Jennifer McClary Groh, Martin D Johnson, Christopher L Burcham, Bradley M Campbell, William D Diseroad, Michael R Heller, John R Howell, Neil J Kallman, Thomas M Koenig, Scott A May, Richard D Miller, David Mitchell, David P Myers, Steven S Myers, Joseph L Phillips, Christopher S Polster, Timothy D White, Jim Cashman, Declan Hurley, Robert Moylan, Paul Sheehan, Richard D Spencer, Kenneth Desmond, Paul Desmond, Olivia Gowran
Advances in drug potency and tailored therapeutics are promoting pharmaceutical manufacturing to transition from a traditional batch paradigm to more flexible continuous processing. Here we report the development of a multistep continuous-flow CGMP (current good manufacturing practices) process that produced 24 kilograms of prexasertib monolactate monohydrate suitable for use in human clinical trials. Eight continuous unit operations were conducted to produce the target at roughly 3 kilograms per day using small continuous reactors, extractors, evaporators, crystallizers, and filters in laboratory fume hoods...
June 16, 2017: Science
https://www.readbyqxmd.com/read/28610090/review-of-the-subgenus-i-xizicus-i-i-xizicus-i-gorochov-1993-orthoptera-tettigoniidae-meconematinae-from-china
#20
Jiyuan Feng, Fuming Shi, Shaoli Mao
Gorochov (1993) erected the subgenus Xizicus (Xizicus), with the type species Xizicus (Xizicus) fascipes (Bey-Bienko, 1955). This subgenus is distinguished from the other subgenera of Xizicus by the following characters: male tenth abdominal tergite with a pair of contiguous posterior processes in the middle; subgenital plate simple, styli slender, located on the apices or subapices of lateral margins; posterior margin of female subgenital plate rounded.
March 23, 2017: Zootaxa
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